Exact inhomogeneous Einstein-Maxwell-Dilaton cosmologies

Details Exact inhomogeneous Einstein-Maxwell-Dilaton cosmologies Exact inhomogeneous Einstein-Maxwell-Dilaton cosmologies

2000-10-18

arxiv.org/abs/hep-th/0010156v3

Phys.Rev. D63 (2001) 063510

Physics

High Energy Physics

High Energy Physics - Theory

10 pages, latex; v2: English corrected, new comments and reference added in section 1, acknowledgments added; v3: final versio

Scientific paper

10.1103/PhysRevD.63.063510

We present solution generating techniques which permit to construct exact inhomogeneous and anisotropic cosmological solutions to a four-dimensional low energy limit of string theory containing non-minimally interacting electromagnetic and dilaton fields. Some explicit homogeneous and inhomogeneous cosmological solutions are constructed. For example, inhomogeneous exact solutions presenting Gowdy - type EMD universe are obtained. The asymptotic behaviour of the solutions is investigated. The asymptotic form of the metric near the initial singularity has a spatially varying Kasner form. The character of the space-time singularities is discussed. The late evolution of the solutions is described by a background homogeneous and anisotropic universe filled with weakly interacting gravitational, dilatonic and electromagnetic waves.

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